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Thanks, it works with appending to LDFLAGS. May I know how to add additional CPP options? It seems manually adding to CXXFLAGS, CPPFLAGS and CXXPPFLAGS won't work in the makefile. Qiyue Lu On Tue, Jul 9, 2024 at 6: 34 PM Satish Balay <balay. anl@ fastmail. org>
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<div dir="ltr"><div>Thanks, it works with appending to LDFLAGS.</div><div>May I know how to add additional CPP options? It seems manually adding to CXXFLAGS, CPPFLAGS and CXXPPFLAGS won't work in the makefile. </div><div><br></div><div>Qiyue Lu<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 9, 2024 at 6:34 PM Satish Balay <<a href="mailto:balay.anl@fastmail.org">balay.anl@fastmail.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">And sometimes you might need to list these additional libraries/options after PETSc libraries - in the link command. One way:<br>
<br>
balay@pj01:~/test$ cat makefile<br>
<br>
include ${PETSC_DIR}/lib/petsc/conf/variables<br>
include ${PETSC_DIR}/lib/petsc/conf/rules<br>
LDLIBS += -foobar<br>
<br>
balay@pj01:~/test$ make ex2<br>
mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g -O0 -I/home/balay/petsc/include -I/home/balay/petsc/arch-linux-c-debug/include ex2.cpp -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib -L/home/balay/petsc/arch-linux-c-debug/lib -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath -foobar -o ex2<br>
g++: error: unrecognized command-line option ‘-foobar’<br>
make: *** [<builtin>: ex2] Error 1<br>
<br>
Satish<br>
<br>
On Tue, 9 Jul 2024, Satish Balay wrote:<br>
<br>
> It depends on your makefile - and how you are over-riding the targets. 1. Why add -rpath to CXXFLAGS, and not LDFLAGS? The following work for me with the default makefile format used by petsc examples<br>
> balay@ pj01: ~/test$ ls ex2. cpp makefile<br>
> ZjQcmQRYFpfptBannerStart<br>
> This Message Is From an External Sender<br>
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> <br>
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> <br>
> It depends on your makefile - and how you are over-riding the targets.<br>
> <br>
> 1. Why add -rpath to CXXFLAGS, and not LDFLAGS?<br>
> <br>
> The following work for me with the default makefile format used by petsc examples<br>
> <br>
> balay@pj01:~/test$ ls<br>
> ex2.cpp makefile<br>
> balay@pj01:~/test$ cat makefile <br>
> <br>
> include ${PETSC_DIR}/lib/petsc/conf/variables<br>
> include ${PETSC_DIR}/lib/petsc/conf/rules<br>
> <br>
> balay@pj01:~/test$ make ex2<br>
> mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g -O0 -I/home/balay/petsc/include -I/home/balay/petsc/arch-lin<br>
> ux-c-debug/include ex2.cpp -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib -L/home/balay/petsc/arch-linux-c-debug/lib -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpath,/usr<br>
> /lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath -o ex2<br>
> balay@pj01:~/test$ make clean<br>
> balay@pj01:~/test$ make ex2 LDFLAGS=-foobar<br>
> mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g -O0 -I/home/balay/petsc/include -I/home/balay/petsc/arch-lin<br>
> ux-c-debug/include -foobar ex2.cpp -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib -L/home/balay/petsc/arch-linux-c-debug/lib -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpa<br>
> th,/usr/lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath <br>
> -o ex2<br>
> g++: error: unrecognized command-line option ‘-foobar’<br>
> make: *** [<builtin>: ex2] Error 1<br>
> balay@pj01:~/test$ make ex2 CXXFLAGS=-foobar<br>
> mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g -O0 -foobar -I/home/balay/petsc/include -I/home/balay/petsc/a<br>
> rch-linux-c-debug/include ex2.cpp -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib -L/home/balay/petsc/arch-linux-c-debug/lib -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpa<br>
> th,/usr/lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath <br>
> -o ex2<br>
> g++: error: unrecognized command-line option ‘-foobar’<br>
> make: *** [<builtin>: ex2] Error 1<br>
> balay@pj01:~/test$ <br>
> <br>
> Satish<br>
> <br>
> On Tue, 9 Jul 2024, Qiyue Lu wrote:<br>
> <br>
> > Hello,<br>
> > I am trying to compile a *.cpp code under PETSc environment. An additional<br>
> > flag is needed to link the metis partition library.<br>
> > ##############<br>
> > # This line is necessary for linking, remember need this flag in both<br>
> > compiler options and linking options<br>
> > LDFLAGS= -fopenmp -lpmix -lmetis<br>
> > <br>
> > # This line is required for using some 'helper' function like<br>
> > cudaErrorCheck from samples suite<br>
> > CXXFLAGS +=<br>
> > -Wl,-rpath,/sw/spack/deltas11-2023-03/apps/linux-rhel8-zen/gcc-8.5.0/metis-5.1.0-v5iddu2/lib<br>
> > # This two lines are required for using PETSc<br>
> > include ${PETSC_DIR}/lib/petsc/conf/variables<br>
> > include ${PETSC_DIR}/lib/petsc/conf/rules<br>
> > ##############<br>
> > <br>
> > However, adding "CXXFLAGS += -Wl,-rpath, path_to_lib" in the makefile under<br>
> > the same directory, is not working. And CPPFLAGS and CXXPPFLAGS won't work<br>
> > either. No errors while compiling, but cannot find the metis.o while<br>
> > running the binary. Another confusing point is, in the compilation flash<br>
> > screen, LDFLAGS options can be found, but CXXFLAGS cannot.<br>
> > <br>
> > Could you please inform me how to add additional flags in the makefile?<br>
> > <br>
> > Thanks,<br>
> > Qiyue Lu<br>
> > <br>
> <br>
> <br>
</blockquote></div>